Zobrazeno 1 - 10
of 88
pro vyhledávání: '"Hossain, Golam Mortuza"'
We study the phenomena of neutrino oscillations and flavour mixing by incorporating the gravitational effects through the Dirac equation in curved spacetime inside a spherically symmetric star. We show that the flavour transition probabilities of the
Externí odkaz:
http://arxiv.org/abs/2409.16232
Neutron stars are known to have strong magnetic fields reaching as high as $10^{15}$ Gauss, besides having strongly curved interior spacetime. So for computing an equation of state for neutron-star matter, the effect of magnetic field as well as curv
Externí odkaz:
http://arxiv.org/abs/2312.16589
We show that a primeval seed magnetic field arises due to spin-degeneracy breaking of fermions caused by the dragging of inertial frames in the curved spacetime of rotating astrophysical bodies. This seed magnetic field would arise even due to electr
Externí odkaz:
http://arxiv.org/abs/2204.12369
Publikováno v:
Journal of Cosmology and Astroparticle Physics, 10, 008 (2022)
We compute the equation of state for an ensemble of degenerate fermions by using the curved spacetime of a slowly rotating axially symmetric star. We show that the equation of state computed in such curved spacetime depends on the gravitational time
Externí odkaz:
http://arxiv.org/abs/2204.12352
Publikováno v:
Phys. Rev. D 104, 123005, 2021
In order to solve the Tolman-Oppenheimer-Volkoff equations for neutron stars, one routinely uses the equation of states which are computed in the Minkowski spacetime. Using a first-principle approach, it is shown that the equation of states which are
Externí odkaz:
http://arxiv.org/abs/2109.09606
Publikováno v:
Journal of Cosmology and Astroparticle Physics, 02, 026 (2021)
In the study of spherical degenerate stars such as neutron stars, general relativistic effects are incorporated by using Tolman-Oppenheimer-Volkoff equations to describe their interior spacetime. However, the equation of states employed in such studi
Externí odkaz:
http://arxiv.org/abs/2005.08783
The present work investigates some exact solutions of the gravitational wave equation in some widely used cosmological spacetimes. The examples are taken from spatially flat and closed isotropic models as well as Kasner metric which is anisotropic. V
Externí odkaz:
http://arxiv.org/abs/2004.13554
The electromagnetic interaction alters the Chandrasekhar mass limit by a factor which depends, as computed in the literature, on the atomic number of the positively charged nuclei present within the degenerate matter. Unfortunately, the methods emplo
Externí odkaz:
http://arxiv.org/abs/1904.09779
Publikováno v:
Rev. Mod. Plasma Phys. 6, 1 (2022)
In the study of degenerate plasmas contained within compact astrophysical objects, both special relativity and general relativity play important roles. After reviewing the existing treatment in the literature, here we employ the methods of relativist
Externí odkaz:
http://arxiv.org/abs/1904.09174
In order to achieve a Hamiltonian-based canonical derivation of the Hawking effect, one usually faces multiple hurdles. Firstly, the spacetime foliation using Schwarzschild time does not lead to hyper-surfaces which are always spacelike. Secondly, th
Externí odkaz:
http://arxiv.org/abs/1902.04781